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Originally Posted by Superman
I agree, two 400 watt is just throwing money out the window and totally unnecessary. You can get great growth out of just about any coral with one good 250 watt MH on a 58 gallon, just as long as you use a bulb that has good PAR and a quality reflector.
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Agreed. My neighbor just set up a 58g and has a 250W DE in a ROIII reflector. It looks real nice. Add some actinics, and you won't even notice the edges aren't getting enough light.

Plus, it's not like you have corals growing all the way to the edge (usually).